Draft-regulator.



G. FROST.

DRAFT REGULATOR.

APPLICATION FILED JULY 21, 1915.

Patented June 6, 1916.

ATTORNEYS WITNESSES KW /&

GEORGE FROST, OF LEVANNA, NEW YORK.

DRAFT-REGULATOR.

Specification of Letters Patent.

- Patented June 6, 1916.

Application filed July 21, 1915. Serial No. 41,115.

To all whom it may concern:

Be it known that I, GEORGE Fnosr, a citizen of the United States, and a resident of Levanna, .in the county of Cayuga and State of New York, have invented certain new and useful Improvements in Draft- Regulators, of which the following is. a specification. I

The main object of my invention is to provide a device of simple but durable construction which may be readily attached to the pipe of a stove or furnace, to prevent the too rapid burning of the fire should a strong wind causing an excessive draft rise during the absence of an attendant.

A further object of my invention is to provide such an automatic regulator or damper with means whereby it can be adjusted so that it will remain inoperative while the fire is burning under a normal draft, but will open to admit atmospheric air to the draft flue should the draft exceed a predetermined maximum.

The invention will be clear from the accompanying description and drawings, and will be particularly pointed out in the claims.

Figure l is a perspective view of my draft regulator attached to a stove pipe. Fig. 2 is a longitudinal sectional view of a stove pipe with my attachment in position. Fig. 3 is a top plan view of my invention. Fig. 41 is an enlarged vertical section taken on line 4-l of Fig. 3.

Referring to the drawings, A is a stove pipe of ordinary construction having the usual damper 1. Below the damper an opening 2 is out in the pipe, and a metallic drum 3 having an opening in its side registering with the opening in the pipe, is secured to the pipe by suitable supporting cars at formed integral with the drum and extending partly around each side of the pipe.

A bracket B has an outwardly extending horizontal arm 5 secured to the top of the drum, and a supporting vertical arm 6 secured to the side thereof. An upturned ear 7 is formed at each side of the bracket arm 5 near its outer end, and an opening 8 having a substantially V shaped lower side is formed in each of these ears;

A lever arm 9 is supported by knife edge lugs 10 formed at either side thereof near its center, which are adapted to rock in the V shaped opening 8.

proj ecting or free end of the lever arm is notched as shown at 14, to support a counter weight 15 at any desired point. The various notches fire numbered or designated by other symols.

The operation of my device is as follows. Normally the weight of the disk 12 holds it down and closes the opening 11 in the drum, and the draft is regulated by the damper 1 in thepipe A. When however, the furnace is unattended and the draft increased abnormally, so that if left alone and thefire would quickly burn itself out, the suction in the pipe A tends to lift the disk 12, the force necessary to lift the disk being -regulated by the position of the counter weight on the lever arm. When the disk rises through the suction of the draft, to the 7 position shown in dotted linesein Fig. 2, atmospheric air is admitted through the opening 11 to the pipe, and the force of the draft is thereby modified, preventing an excessive burning of fuel.

My device will be found especially useful where it is desirable to keep a small fire over night without the attention of a fireman, since by the use of my regulator the fuel. consumption can be reduced to any desired amount.

It will thus be seen that I have provided a regulator, automaticin its action, by which a fire may be dampened whenever the draft I exceeds any predetermined limit, and so prevent the annoyance and trouble due to the burning out of a fire when there is an abnormally strong draft.

I claim:

1. The combination with a draft flue of an air drum lateral thereto and having a lateral opening communicating with the said flue, the said drum having an air inlet. and a valve controlling the same, rearwardly cars at either side of the lateral opening in the drum secured to the flue to support the drum, a bracket connected with the drum, ears on the said bracket having V shaped bearing openings therein, a lever having V shaped lugs adapted to rock in the said bearing openings and having one arm extending over the drum and connected to the above mentioned controlling valve, and

a movable counter weight on the other arm of the lever.

2. The combination with a draft flue of an air drum lateral thereto and having a lateral opening communicating with the said flue, the said drum having an air inlet and a valve controlling the same, a bracket connected with the drum, ears on the said bracket having V shaped bearing openings therein, a lever having V shaped lugs adapted to rock in the said bearing openings, and connecting means between the lever and the above mentioned controlling valve.

3. The combination with a draft flue of an air drum lateral thereto, and having a lateral opening communicating with the said fine, the said drum having an air inlet and a valve controlling the same, rearwardly projecting ears at either side of the lateral opening in the drum secured to the flue to support the drum, a bracket connected with the drum, a lever pivoted on said bracket, and having one arm extending over the drum and connected to the above mentioned controlling valve, and a movable counter weight on the other arm of the lever.

4. The combination with a draft flue of an Copies of this patent may be obtained for five cents each, by addressing the air drum lateral thereto, and having a lateral opening communicating with the said flue, the said drum having an air inlet and a valve controlling the same, rearwardly projecting ears at either side of the lateral opening in the drum partially encircling the draft flue and secured thereto to support the drum, and means for varying the resistance of the said valve to the suction through the air drum.

5. The combination with a draft flue of an air drum lateral thereto, and having a lateral opening communicating with the said flue, the said drum having an air inlet and a valve controlling the same, rearwardly projecting ears at either side of the lateral opening in the drum secured to the flue to support the drum, a laterally extending bracket connected to the drum, and means supported by the said bracket for varying the resistance of the said valve to the suction through the air drum.

GEORGE FROST.

lVitnesses:

B. C. HOWLAND, G120. S. ELLIS.

"Commissioner of Patentl.

Washington, D. 0." 

